Structure 47003100000000 · Kane County, IL

US 30 over Fox River & Il 25

Carries US 30 over Fox River & Il 25, US RTE 30 & Fox Riv.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT985 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

985 ft end to end, longest span 150 ft: about 2.7 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1957rebuilt 2000
Length984.6 ft300.1 m
Daily traffic31,600counted 2023
Last inspectedOctober 2023every 24 months

Location

StateIllinois
CountyKane
LocationUS RTE 30 & Fox Riv
CarriesUS 30
CrossesFox River & Il 25
Coordinates41.72237, -88.34635

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length984.6 ft (300.1 m)
Max Span149.9 ft (45.7 m)
Deck Width67.9 ft (20.7 m)
Deck Area6212.1 sq m
Main Spans7
Year Built1957 (reconstructed 2000)

Traffic

Avg Daily Traffic31,600 (2023)
Truck Traffic6%
Lanes On Bridge4
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number047003100000000

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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